Collet holder



FIG. 1 is a top plan view of a collet holder showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a left side elevational view thereof; and

FIG. 4 is a right side elevational view thereof.

The side opposite to the side shown in FIG. 2 is identical to thatfigure.

The ornamental design for a collet holder, as shown and described.